What careers let me travel and help people?

Just a guess but flight attendant would work.

The Peace Corps

Tour Guide

Any job in which you serve as the person (within your company) who goes to other venues and sets up new programs for other branches of your company, or in which you go to new companies to teach them how to use equipment or programs.

Personal Trainer

Personal Chef (with multiple clients)

Caterer

Tutor (for any number of subjects)

Cruise Ship (exercise coach, dance instructor, activities director, healthy meals chef)

Motivational Speaker (on any number of topics)

Author (especially if you write some type of self-help book, or a healthy lifestyles book or a healthy cook book)

There are many NGOs and religious organizations that send folks around the world to help. You’ve got the UN and the Red Cross and many secular organizations as well. Try the American Friends Serviced Committee if you want an organization with the right politics but who is not screwed up by their religion. They are actually quite sensitive to the indigenous people’s, unlike other religious organizations who are there to make converts.

Nursing would allow you to make decisions that would require traveling. Doctors without Borders and other medical organizations that go to foreign places to help the citizens with health problems always need nurses. The Red Cross always need nurses too.

The diplomatic corps.

Travel guide. Travel writer.

Depends on how you define “help” – photojournalists/reporters get to travel all over and when they get to cover stories about disaster or hardship elsewhere e.g. famine in Sudan, flooding in Bangladesh or earthquakes etc., just doing their job and bearing witness to the human costs and calamity is helping too because they bring the world’s attention to these events and hopefully draw aid/help as well.

Humanitarian work.

Traveling for work and traveling for fun are two different experiences.
Assuming you’re American.
You can travel for a US based company or move abroad and work for foreign companies.
Almost every job can be done at home or abroad but language barriers, visa requirements, infrastructure, and country priorities can affect how easy it is for a foreigner to get a job.
It is not clear how you define help, as someone already pointed out. The entertainer, the humanitarian aid worker, the machinist, the researcher – arguably all of them help people, but in very different ways. Also you didn’t say where you want to go.

I’ve met people who teach English abroad, engineers that travel internationally, doctors and nurses that work abroad, travel/adventure writers and photographers, musicians, a boat sail maker, carpenters, military folk, commercial airline pilots, scientists,...

My mom was looking into being a traveling nurse….that’s all I can think of really.